It’s kind of an interesting idea.
$10 $5 for 2 L of starter wort? I’m in the wrong business. :o
Edit: Just noticed that you’d also need sterile water on hand to dilute it.
Not according to their YouTube video. http://youtu.be/GXEV513Ya4Q
In that case, why not just dump DME into tap water and shake to dissolve and aerate?
I do that for almost all of my starters and it works just fine. I only boil starters if I have an old yeast pack or waking up bottle dregs - cases where I’m starting with a low cell count that can’t compete as well with potential contaminants.
I like the idea behind this product, but don’t see the benefit if it needs dilution.
I’ve also heard that Malta Goya works in a pinch. That’s probably a lot more cost effective.
It’s too early to do the math, but I’m pretty sure you could buy a pressure canner and make your own for cheaper. At least that’s what we’ve been doing - I’m much too lazy to boil a starter but I can surely can starter wort!
I think this will sell. It’s $10 for 4 cans. That’s $2.50 for a 2L starter. If you use 8oz of DME in a 2L starter your cost is close to $2 and you have the hassle of boiling it (if you boil it) and cleaning up.
In their Q/A they claim you should dilute with tap water. The SG before dilution is 1080.
$2.50 for a 1l starter. Cans are pints.
Whoops! Thanks. Good catch.
I’m too lazy for even that… I just collect the tail runnings from high-gravity beers and store them in a gallon water jug in the freezer.
Yeah, canning would be sterilizing and you can store at room temp, but I would think that one could boil up a large batch of starter wort and freeze in sanitized quart food containers. Pull one or two out of the freezer when needed and thaw out in the microwave.
The freezer is full of meat and frozen fruit. 
I just started doing this while I’m canning other food stuffs.